I remember that timonthy Carter wasn't the real name of that man.
I think Brett Patridge is red john, but the name is an alias, an he's real name is Ellis Mars,
Red john is very to smart, and they like to make some really twist in the story, may be we are thinking to lo logical
I also think that the guy that plays Ellis Mars is involved, because he appears in a Red John episode, and why Todd Johnson didn't kill him. He could easy kill him and blame him for the mulder, but he didn't...why?